1. Wireless Ad Hoc Networks

2. Outline Wireless Ad Hoc Network Advantages Applications
Mobile Ad-hoc Network
Wireless Sensor Network
Wireless Mesh Network
Vehicular Ad-Hoc Network

3. Wireless Ad-Hoc Network
Wireless Ad-Hoc network: is a collection of autonomous nodes or terminals that communicate with each other by forming a multi-hop radio network and maintaining connectivity in a decentralized manner

4. Advantages They can be set up very fast They are very resilient
They are spectrally more efficient than cellular network
They have potential for multiple concurrent communication
They have cheap deployment because of non-requirement of base station.

5. Application In military communication
Sensor network: for sensing forest fires, monitoring building, studying wildlife.
Mobile ad hoc network of satellites can be designed for emergency applications such as disasters management, rescue operations
Vehicular Communication: Each vehicle equipped with a communication device will be a node in the ad-hoc network for applications such as collision warning, road sign alarms
Meueums
E-Commerce
Campus Network

6. Mobile Ad-hoc Network (MANET)
MANET: is a self-configuring network of mobile routers (and associated host) connected by wireless links forming an arbitrary topology.
Owing to nodal mobility, the network topology may change rapidly and unpredictably over time.

7. Wireless Sensor Networks

8. Sensor Sensor node Sensor network A transducer
Measures a physical phenomenon e.g. heat, light, motion, vibration, and sound and transmits it
Sensor node
Basic unit in sensor network
Contains on-board sensors, processor, memory, transceiver, and power supply
Sensor network
Consists of a large number of sensor nodes
Nodes deployed either inside or close to the phenomenon/parameter being sensed

9. Sensor node localization mobility sensing processing unit transceiver
storage
transceiver
power unit
energy scaravenging

10. Typical sensor characteristics
Consume low power
Autonomous
Operate in high volumetric densities
Adaptive to environment
Cheap
Limited resources & capabilities (e.g., memory, processing, battery)

11. Wireless sensor and actuator networks (WNSs) make Internet of Things possible
Computing, transmitting and receiving nodes, wirelessly networked for communication, control, sensing and actuation purposes
Characteristics of WNSs
Battery-operated nodes
Limited wireless communication
Reduced coordination
Mobility of nodes

12. Wireless Mesh Network
A wireless mesh network (WMN) is a communications network made up of radio nodes organized in a mesh topology. It is also a form of wireless ad hoc network. Wireless mesh networks often consist of mesh clients, mesh routers and gateways. 

13. Wireless Mesh Network

14. Vehicular Ad Hoc Networks
Vehicular Ad Hoc Networks (VANETs) are created by applying the principles of mobile ad hoc networks (MANETs) - the spontaneous creation of a wireless network for data exchange - to the domain of vehicles.
They are a key component of intelligent transportation systems (ITS).

15. Vehicular Ad Hoc Networks

16. Applications for VANETs
Public Safety Applications
Traffic Management Applications
Traffic Coordination and Assistance Applications
Traveler Information Support Applications
Comfort Applications
Air pollution emission measurement and reduction
Law enforcement
Broadband services
公共安全
交通管理
交通協調、幫助
旅人資訊
舒適性應用 空汙
救護車、消防車
寬頻服務

17. The end